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Patented Aug. 9, I898. M. G. F. BUCKLEY.

' PLASTEB BOARD.

( Application filed Oct. 19, 1897.)

(No Model.)

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UNITED STATES PATENT @rrrcn. I

MICHAEL o. F. BUCKLEY, on NEW YORK, N. Y., Ass1eNoR on ONE-HALF TO BEJAMIN n. SCHWARTZ, on SAME PLACE.

PLASTER-BOARD.

SPECIFICATION forming part of Letters Patent No. 608,570, dated August9, 1898. Application filed October 19, 1897. Serial No. 655,730. (Nomodel.)

To all whom it. may concern.-

Be it known that 1, MICHAEL G. F. BUCK- LEY, of New York city, countyand State of New York, have invented an Improved Plaster-Board, of whichthe following is a specification.

This invention relates to a plaster-board which is of superior strength,can be readily applied to straight and curved surfaces, and will presentextensive key-grooves to the mortar coating.

In the accompanying drawings, Figure 1 is a face view of my improvedplaster-board; Fig. 2, a cross-section thereof, and Fig. 3 a similarsection showing the board curved.

The letters a a represent a number of parallel rectangular slabs made ofplaster-ofparis or other plastic material and connected by a continuousbacking of woven-wire fabric 1), embedded Within the same. The slabs aare so arranged as to form open parallel spaces or slots 0 between them,within which the wire fabric 1) is exposed. These wired openings 0 thusconstitute the joints between the slabs and also form key-grooves forgripping the usual mortar coating. Each slab a, is

provided with a short transverse arm a of a length to extend half-wayacross the slot 0 and abut against a corresponding arm of the adjoiningslab, the several pairs of arms a being arranged to break joint.

The-entire plaster-board formed as described may be rolled up andreadily attached to the studding in a manner similar to wallpaper. Itmay with equal facility be attached to curved and straight surfaces, asthe wired joints permit the board to assume a convex contour, Fig. 3.NVhen applied to straight surfaces, the arms a will form connectinglinksbetween the slabs that greatly increase the rigidity of the structure.Finally, the extensive wired key-grooves between the slabs form sucheffective gripping-surfaces for the mortar that the latter may beapplied without wetting and will adhere withincreased tenacity.

What I claim is- 1 I 1. A plaster-board composed of a series of spacedslabs and of a common backing upon

